CORRECTION 4/4/08

One of the people chosen for this year's 20 in their 20s is not eligible for inclusion because he gave incorrect information about his age.

Dwight Zahringer, chosen for his efforts to funnel used wireless devices to charities, is actually 32, according to two online public record databases.

Zahringer gave his age as 29 on the form he filled out to be considered for 20 in their 20s and verified it to two Crain's Detroit Business staff members afterward.

Assistant Managing Editor Jennette Smith reviewed an e-mail sent to Crain's last week asserting that Zahringer was over 30. Smith then left a message for Zahringer requesting proof of age. Zahringer on Thursday faxed a letter withdrawing from events surrounding 20 in their 20s "for personal reasons."

Crain's uses a lengthy multi-stepped process to select those honored as 20 in their 20s. That includes vetting candidates with outside sources about their accomplishments. To date, however, ages have not been independently verified. That will change in the future for this feature and others, such as 40 under 40, where age is among the criteria.

Crain's deeply regrets that a much sought-after slot was used for a candidate who did not deserve it.